Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
  • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
  • G01P3/42—Devices characterised by the use of electric or magnetic means
  • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
  • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
  • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles

Definitions

• This invention relates to a magnetic ring mounting fixture for the mounting of a magnetic ring on an automotive vehicle wheel hub.
• the magnetic ring rotates with the hub, and a stationary sensor disposed adjacent the magnetic ring picks up impulses from the magnetic ring to provide an electrical signal representative of wheel speed.
• the magnetic ring is polarized at regular intervals so that when the wheel hub rotates, magnetic impulses are detected by an adjacent stationary se ⁇ sor to provide an electrical signal representative of wheel speed.
• the present invention relates to a new and unique means for mounting the magnetic ring on the wheel hub.
• One of the features of the invention is that the mounting takes advantage of the presence of other parts so that mounting is accomplished without separate attaching parts.
• the invention enables meaningful cost economies to be achieved in comparison to other means for mounting the magnetic ring on the wheel hub.
• Fig. 1 is a view, partly in cross section, of an automotive vehicle wheel hub and spindle including a wheel
• Fig. 2 is a transverse cross sectional view taken in the direction of arrows 2-2 in Fig. 1.
• Fig. 3 is an enlarged view of a portion of Fig. 2.
• the drawings show a wheel hub 10 that is journaled on a spindle 12 by means of bearings 14, 16 for rotation about the spindle axis 18.
• the hub has a radial flange 20
• the axially inner end of the spindle has a radial flange 24, and a backing plate 26 is affixed to the axially outer face of flange 24 by any conventional 0means of attachment.
• a sensor 28 is fixedly mounted on backing plate 26 in radially outwardly spaced relation to the spindle and hub. Sensor 28 has a sensing tip 30 that confronts, but is spaced just slightly radially outwardly of, a magnetic
• the axially inner end of hub 18 comprises a groove 34 extending around the outside surface of the hub.
• the groove is defined by an axially inwardly facing shoulder
• Magnetic ring 32 has a generally rectangular cross section and fits into groove 34 such that with a radially inner portion of the axially outer face of the ring disposed against the axially inwardly facing shoulder of the groove, the axially inner face of the ring is substantially flush with the axially innermost surface of the hub.
• the radially inner face of ring 32 is made
• a sealing ring 44 fitted to the axially inner end " of the hub performs the double function of forming a grease 5 seal for the axially inner end of the interior of the hub and of cooperating with shoulder 36 to axially capture magnetic ring 32.
• Ring 44 comprises an axial wall 46 that is press-fitted into the axially inner end of the hub, a radial wall 48 that extends radially outwardly from the oaxially inner end of wall 46 to radially overlap magnetic ring 32, and a lip 50 that curls radially inwardly and axially outwardly from the junction of walls 46 and 48 to form a wiper-type seal against spindle 12.
• the magnetic ring is magnetically polarized at 5regular intervals so that as the hub rotates on the spindle, the magnetic impulses are detected by sensor 28 which then provides an electrical signal representing the instantaneous rotational velocity of the wheel hub.
• sensor 28 may be a Hall sensor. Q Because of the non-circular fitting of the magnetic ring onto the hub and the use of the sealing member for axially capturing the magnetic ring on the hub, no separate parts are required for mounting the magnetic ring on the hub. While a preferred embodiment of the invention has been described, it should be understood that principles of the invention are applicable to other embodiments.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Transmission And Conversion Of Sensor Element Output (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=23559639

Family Applications (1)

Country Status (4)

Families Citing this family (8)

Family Cites Families (2)

• 1989
  • 1989-08-16 US US07/394,599 patent/US4932245A/en not_active Expired - Fee Related
• 1990
  • 1990-08-02 EP EP19900912507 patent/EP0487584A1/de not_active Withdrawn
  • 1990-08-02 WO PCT/EP1990/001271 patent/WO1991002984A1/en not_active Application Discontinuation
  • 1990-08-02 JP JP2511718A patent/JPH04507293A/ja active Pending

Non-Patent Citations (1)

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